Microgrid Control Firmware Engineer - Morrisville​/Raleigh, NC

Delta, founded in 1971, is a global leader in switching power supplies and thermal management products with a thriving portfolio of smart energy-saving systems and solutions in the fields of industrial automation, building automation, telecom power, data center infrastructure, EV charging, renewable energy, energy storage and display, to nurture the development of smart manufacturing and sustainable cities. As a world-class corporate citizen guided by its mission statement, "To provide innovative, clean and energy-efficient solutions for a better tomorrow," Delta leverages its core competence in high-efficiency power electronics and its ESG-embedded business model to address key environmental issues, such as climate change.

Delta serves customers through its sales offices, R&D centers and manufacturing facilities spread over close to 200 locations across five continents. Delta has 158 sales offices, 72 R&D centers and 48 manufacturing facilities worldwide.

Throughout its history, Delta has received various global awards and recognition for its business achievements, innovative technologies, and dedication to ESG. Since 2011, Delta has been listed on the DJSI World Index of Dow Jones Sustainability Indices for 11 consecutive years. In 2021, Delta was also recognized by CDP with leadership level ratings for its substantial contribution to climate change and water security issues and named Supplier Engagement Leader for its continuous development of a sustainable value chain.

At Delta, we're leading the energy transition with innovative solutions in solar inverters, energy storage systems, and EV charging infrastructure. Our technologies are helping utilities, businesses, and communities decarbonize and build resilient, intelligent energy ecosystems. Join us in creating a cleaner, smarter energy future.

Role Summary

Responsible for the implementation, tuning, and validation of unit-level and grid-code compliant control firmware for power electronic and generation assets within microgrid and utility-connected systems. This role bridges equipment-level control logic and regulatory grid code requirements across PCS, BESS, generators, and auxiliary systems, ensuring safe, deterministic, and compliant operation under all operating conditions.

• Implement unit-level control logic for PCS, BESS, generators, SSTs, and balance-of-plant equipment
• Develop startup, shutdown, fault handling, and recovery sequences with deterministic behavior
• Implement grid-code required functions including voltage control, frequency response, LVRT/HVRT, and protection coordination
• Develop and tune GFL and GFM control modes including active/reactive power control and ramp-rate limits
• Implement local safety limits, interlocks, fallback logic, and protective functions
• Ensure proper prioritization and coordination of commands between unit controllers, real-time controllers, and EMS
• Validate control firmware through simulation, SIL, HIL, factory testing, and field commissioning support
• Support certification, type testing, and utility or regulatory compliance demonstrations
• Troubleshoot field issues and support commissioning activities
• Document control logic, state machines, configuration parameters, and known limitation

• Bachelor's degree in Electrical Engineering, Power Electronics, Controls, or related field (Master's preferred)
• 3-7+ years of experience in control firmware implementation for PCS, inverters, or unit controllers
• Strong understanding of inverter-based resource behavior and utility grid codes
• Experience with PLCs, embedded controllers, or real-time control platforms
• Familiarity with dynamic simulation and validation tools such as PSCAD or equivalent
• Strong debugging,…